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| 1 <!-- |
| 2 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 3 // Use of this source code is governed by a BSD-style license that can be |
| 4 // found in the LICENSE file. |
| 5 --> |
| 6 <!DOCTYPE html> |
| 7 <html> |
| 8 <head> |
| 9 <meta charset="utf-8"> |
| 10 <title>WebGL Enable Vertex Attrib Zero Test</title> |
| 11 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 12 <script src="../../resources/js-test-pre.js"></script> |
| 13 <script src="../resources/webgl-test.js"> </script> |
| 14 <script src="../resources/webgl-test-utils.js"> </script> |
| 15 </head> |
| 16 <body> |
| 17 <canvas id="example" width="50" height="50"> |
| 18 </canvas> |
| 19 <div id="description"></div> |
| 20 <div id="console"></div> |
| 21 <script id="vshader" type="x-shader/x-vertex"> |
| 22 attribute vec4 vPosition; |
| 23 void main() |
| 24 { |
| 25 gl_Position = vPosition; |
| 26 } |
| 27 </script> |
| 28 |
| 29 <script id="fshader" type="x-shader/x-fragment"> |
| 30 void main() |
| 31 { |
| 32 gl_FragColor = vec4(0.0,0.0,0.0,0.0); |
| 33 } |
| 34 </script> |
| 35 |
| 36 <script> |
| 37 description("Test some of the issues of the difference between attrib 0 on OpenG
L vs WebGL"); |
| 38 debug(""); |
| 39 var wtu = WebGLTestUtils; |
| 40 var canvas = document.getElementById("example"); |
| 41 var gl = wtu.create3DContext(canvas); |
| 42 |
| 43 function setup(numVerts, attribIndex) { |
| 44 var program = wtu.setupProgram( |
| 45 gl, |
| 46 [wtu.loadShaderFromScript(gl, 'vshader', gl.VERTEX_SHADER), |
| 47 wtu.loadShaderFromScript(gl, 'fshader', gl.FRAGMENT_SHADER)], |
| 48 ['vPosition'], [attribIndex]); |
| 49 // draw with something on attrib zero with a small number of vertices |
| 50 var vertexObject = gl.createBuffer(); |
| 51 g_program = program; |
| 52 g_attribLocation = attribIndex; |
| 53 shouldBe("g_attribLocation", "gl.getAttribLocation(g_program, 'vPosition')"); |
| 54 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); |
| 55 gl.bufferData( |
| 56 gl.ARRAY_BUFFER, new Float32Array(numVerts * 3), gl.STATIC_DRAW); |
| 57 gl.vertexAttribPointer(attribIndex, 3, gl.FLOAT, false, 0, 0); |
| 58 var indices = new Uint16Array(numVerts); |
| 59 for (var ii = 0; ii < numVerts; ++ii) { |
| 60 indices[ii] = ii; |
| 61 } |
| 62 var indexBuffer = gl.createBuffer(); |
| 63 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer); |
| 64 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW); |
| 65 return program; |
| 66 } |
| 67 |
| 68 var p1 = setup(3, 0); |
| 69 var p2 = setup(60000, 3); |
| 70 |
| 71 for (var ii = 0; ii < 5; ++ii) { |
| 72 gl.useProgram(p1); |
| 73 gl.enableVertexAttribArray(0); |
| 74 gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0); |
| 75 glErrorShouldBe( |
| 76 gl, gl.NO_ERROR, |
| 77 "drawing using attrib 0 with 3 verts"); |
| 78 |
| 79 gl.useProgram(p2); |
| 80 gl.enableVertexAttribArray(3); |
| 81 gl.drawArrays(gl.LINES, 0, 60000); |
| 82 glErrorShouldBe( |
| 83 gl, gl.NO_ERROR, |
| 84 "drawing using attrib 3 with 60000 verts"); |
| 85 } |
| 86 |
| 87 wtu.checkCanvas(gl, [0, 0, 0, 0], "canvas should be 0, 0, 0, 0"); |
| 88 |
| 89 successfullyParsed = true; |
| 90 </script> |
| 91 <script src="../../resources/js-test-post.js"></script> |
| 92 |
| 93 </body> |
| 94 </html> |
| 95 |
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Chromium Code Reviews
Issue 8342021:
Add webgl conformance tests r15841. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/